Couldn't find any numbers posted on tarp line tension, so I did some measuring with a cheap dial scale I found in the fishing section of the local Walmart.
Measurements were on my experimental 5' x 10' "pseudo-cat". The ridge line tension was about 25 lbs and guy line tension was about 5 to 7 lbs.
Edit: should have said "ridge tie line". I don't use a separate ridge line.
FYI, FWIW, YMMV, etc, etc....